想請教大家個問題，用Where的問句
1. John has gone to Taipei.
→ Where has John gone?
這邊就我所知，是不用加to的
2. Jane walked to the park yesterday.
a. Where did Jane walk yesterday?
b. Where did Jane walk to yesterday?
不知道要不要加to呢
如果是a.的話，回答不是應該是 Jane walked in the park yesterday. 嗎？
還是說這類改問句是Where開頭的是不用加介系詞呢?
謝謝大家